/* ------------reset------------ */

* {
    margin: 0;
    padding: 0;
}

html,
body {
    width: 100%;
    min-width: 1000px;
    height: 100%;
    min-height: 400px;
    overflow: hidden;
}
.container {
    position: relative;
    width: 100%;
    height: 100%;
    min-width: 100px;
    min-height: 400px;
}
/*  ------------画布 ------------ */
/* 遮罩层 */

#mask {
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, .8);
    z-index: 900;
}
/* 天空背景 */

#sky {
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0, 150, 255, 1), rgba(0, 150, 255, .8), rgba(0, 150, 255, .5));
}
/* 月亮 */

#moon {
    position: absolute;
    top: 50px;
    right: 200px;
    width: 120px;
    height: 120px;
    background: rgba(251, 255, 25, 0.938);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(251, 255, 25, 0.5);
    z-index: 9999;
}
/* 闪烁星星 */

.blink {
    position: absolute;
    background: rgb(255, 255, 255);
    border-radius: 50%;
    box-shadow: 0 0 5px rgb(255, 255, 255);
    opacity: 0;
    z-index: 10000;
    animation: blingbling 2s linear infinite;
}
/* 流星 */

.star {
    position: absolute;
    opacity: 0;
    animation: fall 5s linear infinite;
    z-index: 10000;
}

.star::after {
    content: "";
    display: block;
    border: solid;
    border-width: 2px 0 2px 80px;
    /*流星随长度逐渐缩小*/
    border-color: transparent transparent transparent rgba(255, 255, 255, 1);
    border-radius: 2px 0 0 2px;
    transform: rotate(-45deg);
    transform-origin: 0 0 0;
    box-shadow: 0 0 20px rgba(255, 255, 255, .3);
}
/* 云 */

.cloud {
    position: absolute;
    width: 100%;
    height: 100px;
    /* background: #fff; */
    animation: float 2s linear infinite;
}

.cloud-1 {
    bottom: -100px;
    z-index: 1000;
    opacity: 1;
    animation-delay: 1s;
    transform: scale(1.5);
    -webkit-transform: scale(1.5);
    -moz-transform: scale(1.5);
    -ms-transform: scale(1.5);
    -o-transform: scale(1.5);
}

.cloud-2 {
    left: -100px;
    bottom: -50px;
    z-index: 999;
    opacity: .5;
    transform: rotate(7deg);
    animation-delay: 1.4s;
}

.cloud-3 {
    left: 120px;
    bottom: -50px;
    z-index: 999;
    opacity: .1;
    transform: rotate(-10deg);
    animation-delay: 1.8s;
}

.circle {
    position: absolute;
    border-radius: 50%;
    background: #fff;
}

.circle-1 {
    width: 100px;
    height: 100px;
    top: -50px;
    left: 10px;
}

.circle-2 {
    width: 150px;
    height: 150px;
    top: -50px;
    left: 30px;
}

.circle-3 {
    width: 300px;
    height: 300px;
    top: -100px;
    left: 80px;
}

.circle-4 {
    width: 200px;
    height: 200px;
    top: -60px;
    left: 300px;
}

.circle-5 {
    width: 80px;
    height: 80px;
    top: -30px;
    left: 450px;
}

.circle-6 {
    width: 200px;
    height: 200px;
    top: -50px;
    left: 500px;
}

.circle-7 {
    width: 100px;
    height: 100px;
    top: -10px;
    left: 650px;
}

.circle-8 {
    width: 50px;
    height: 50px;
    top: 30px;
    left: 730px;
}

.circle-9 {
    width: 100px;
    height: 100px;
    top: 30px;
    left: 750px;
}

.circle-10 {
    width: 150px;
    height: 150px;
    top: 10px;
    left: 800px;
}

.circle-11 {
    width: 150px;
    height: 150px;
    top: -30px;
    left: 850px;
}

.circle-12 {
    width: 250px;
    height: 250px;
    top: -50px;
    left: 900px;
}

.circle-13 {
    width: 200px;
    height: 200px;
    top: -40px;
    left: 1000px;
}

.circle-14 {
    width: 300px;
    height: 300px;
    top: -70px;
    left: 1100px;
}
/*动画*/
/*云*/
/*@keyframes float {
      0% {
          bottom: -50px;
      }
      50% {
          bottom: -45px;
      }
      100% {
          bottom: -50px;
      }
  }*/